The physicists Abraham Pais, Murray Gell-Mann and Kazuhiko Nishijima came up with a cunning strategy to solve this puzzle. They proposed a new property like charge that mediated the way these particles interacted or didn’t interact with the strong nuclear force. This new property, called strangeness, gave physicists a new way to classify all these new particles. Each new particle was given a measure of strangeness according to whether or not its decay would have to take the long route.
